Douche-nozzle detail



Patented Aug. 20, 19.539.

UNITEB STATES.

wILLmM novaox, or BROOKLYN, NEW YORK.

DOUCHE-NOZZLE DETAIL.

Application filed September 7, 1925.

m ll1lS invention relates to douche nozzles.

Its object is to improve and cheapen the manufacture of said instruments. More particularly, the object of the invention is to render possible the automatic assemblage of the parts making up such a structure with a mmimizing of hand-fitting and labor in spite of irregularities incident to the manufacture of the individual elements going to make up the same.

Still more particularly, the object of the invention is to provide for the pivotal attachment of dilating arms to an operating stem regardless of irregularities in the positioning of the pivoting means.

The above will be pointed out more particularly in the following claims which are directed solely for purposes of illustration to an illustrative embodiment of the invention, described in the following specification in connection with the accompanying drawings which form a part hereof.

In the drawings,

Fig. 1 is a fractional vertical axial section through the finished instrument with the dilating arms contracted;

Fig. 2 is a similar view with the arms dilated;

Fig. 3 is an enlarged vertical axial section through the pivoting sleeve;

Fig. 4 is a perspective view thereof;

' 5 is a view illustrating incidental inaccuracies in the dilator arm construction;

Fig. (5 illustrates a jig-assembled set of di la'ting arms and the pivoting sleeve;

7 illustrates the finished assemblage of pivoting sleeve and dilator arms; and

Fig. 8 is an axial end-view of the structure shown in Fig. 7.

The dilating douche nozzle is of the gen eral type described in my Patent No. 1,665,790.

A relatively fixed protective sheath or shell A encloses an axially movable stem B which operates a set of dilating arms C extending into the shell A through a cam follower nipple 1. In this construction, all the cam configuration is provided by the part 2 on the dilator arms and the cam follower nipple l is provided with notches 3, one for each dilating arm, the bottoms 4 of which notches are plane surfaces parallel to the axis of the stem B, which greatly facilitates the construction of these nipples. The nipples are provided with threads 5 to thread into the shell Serial No. 54,852.

A All the parts are preferably constructed of nlckel plated brass except the pivoting sleeve 1) which is preferably formed of nickel silver and may conveniently be secured to the stem B by blunt-nosed prick punches 6. In the construction of the sleeve D a pair of outstanding flanges 7 and 8 are formed integrally thereon with a convenient end space 9 suliicient to accommodate the thickness of pivot pins 10 seated in suitable perforations 11 in the ends 12 of the dilating arm C. These flanges 7 and 8 are cut away to form circunr ferentially spaced notches 13 of a width to accommodate the thickness of a dilator arm, but preferably of a depth extending all the Way down to the sleeve proper to provide for a radial adjustment of the end of a dilating arm, thus in fact there is produced a sleeve I) carrying four double sets of axially and circumferentially spaced ears 15 and 16. I

fabricating the finished nozzle it is preferred that a suitable jig hold the parts in relative position as shown in Fig. 6,'in which case, it is immaterial whether a pivot pin be accurately centered in the end of a dilator arm, as shown at the left of Fig. 5, or axially off center, as shown at the right of Fig. 5. Suitable means is employed to crush the ears 15 and 16 into crushed formations 17, as shown in Fig. 7, to grip and seat the pivot pins 10.

When thus assembled a relative axial movement between the stem B and the shell A causes the cam formations on the dilating arms riding on the cam followers 4 to expand or dilate the dilating arms.

What I claim and desire to secure by United States Letters Patent is:

1. In a dilating douche nozzle a tubular shell; a stem guided for axial movement relatively to said shell; a set of dilating arms provided with cam formations near their ends; individual pivot pins, one for the end of each said dilator arm; a sleeve adapted to be secured to said stem and having a pair of outstanding spaced flanges provided with notches, one notch for each dilator arm; portions of said flanges adjacent to said notches being crushed into grip engagement with said pivot pins.

2. In a dilating douche nozzle, a tubular shell, a stem guided for axial movement relatively to said shell, a set of dilating arms provided with cam formations near their ends, an individual pivot pin for the end of each dilator arm, a sleeve adapted to be secured to said stem and having a pair of outstanding spaced flanges provided with a notch for each dilator arm, portions of said flanges adjacent to said notches being crushed into grip engagement with said pivot pins, the depth of said notches being greater than the depth required to accommodate a perfectly positioned and perfectly pivoted dilator arm, whereby irre ularities in manufacture are l0 compensated.

.3. In a dilating douche nozzle an operating stem; a set of dilating arms operated by said stem, each of said arms being provided with a short pivot pin at one end; and a sleeve adapted to be fixed to said stem; a double ring of axially and circumferentially spaced ears provided on said sleeve of material bend able into gripping engagement With said pivot pins.

' WILLIAM NOVACK. 

